5
Redefining Flow Control
Setting the actuator stop bolts
Stop Bolts
There are no stop bolts fitted in the ROM 1,A.
Adjusting the stop bolts in and out will increase or
decrease the valve travel. It is recommended that
stop bolt adjustment be carried out by the valve
maker/supplier before the valve is fitted into the
pipe work. Once installed, the valve maker/supplier
should be consulted before stop bolt re-adjustment
is carried out. After resetting the stop bolts the limit
switches must be reset. The stop bolts are factory
set to give a nominal 90º travel. If fitted the stop
bolts are located near the gearbox base. Stop bolt
adjustment allows variation at each end position.
Screwing the bolt in reduces movement, out
increases movement.
For clockwise closing valves the right hand stop
bolt is the closed stop. The left is the open stop as
shown in the picture.
Adjustment for non-seating valve types
For closed and open stop position adjustments.
Undo stop bolt lock-nut. Move actuator and valve to
the required stopping position (it may be necessary
to unscrew stop bolt to allow more travel). Screw
stop bolt in until a stop is felt. Tighten stop bolt
lock nut.
Adjustment for seating valve types
For closed and open stop position adjustments.
Undo stop bolt lock-nut. Move actuator and valve
to the required seating position of the valve (it may
be necessary to unscrew stop bolt to allow more
travel). Screw stop bolt in until a stop is felt then
back off by two turns. Tighten stop bolt lock nut
Setting clockwise to close stop bolt
Setting anti-clock to close stop bolt
